Does the issue described in the entry that Wouter sent seem to apply to you?
If you do implement a custom logger to redirect these errors, I’m not sure if you’ll be able to filter just those related to this problem. In other words, if you create a custom logger for ServerRuntime$Responder, might you also redirect other log entries that might be more relevant to a higher priority problem. THe log messages will still be logged, but you would need to be conscious to monitor the alternate log file since they would not show up in the regular openHAB logger display.
There are was to implement filters in a custom logger that could allow you to create one for ServerRuntime$Responder and only redirect messages associated with this specific issue. You would need to be able to identify something unique to these messages in order to trap only these messages.